W83977F Datasheet, PDF (48/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

W83977F/ W83977AF
PRELIMINARY
7 6 5 4 3 21 0
0
S/W RESET (Bit 7):
This bit is the software reset bit.
DRATE0
DRATE1
PRECOMP0
PRECOMP1
PRECOMP2
POWER DOWN
S/W RESET
POWER-DOWN (Bit 6):
0 FDC in normal mode
1 FDC in power-down mode
PRECOMP2 PRECOMP1 PRECOMP0 (Bit 4, 3, 2):
These three bits select the value of write precompensation. The following tables show the
precompensation values for the combination of these bits.
PRECOMP
210
000
001
010
011
100
101
110
111
PRECOMPENSATION DELAY
250K - 1 Mbps
2 Mbps Tape drive
Default Delays
Default Delays
41.67 nS
20.8 nS
83.34 nS
41.17 nS
125.00 nS
62.5nS
166.67 nS
83.3 nS
208.33 nS
104.2 nS
250.00 nS
125.00 nS
0.00 nS (disabled)
0.00 nS (disabled)
Publication Release Date: March 1998
-37 - Revision 0.58